Generation and Realization of Digital Chaotic Key Sequence Based on Double K-L Transform  

作　　者：DU Baoxiang GENG Xiaoli CHEN Fangyue PAN Jing DING Qun 

机构地区：[1]Key Laboratory of Electronic Engineering College of Heilongjiang Province, Heilongjiang University, Harbin 150080, China [2]School of Science, Hangzhou Dianzi University, Hangzhou 310018, China

出　　处：《Chinese Journal of Electronics》2013年第1期131-134,共4页电子学报（英文版）

基　　金：This work is supported by the National Natural Science Foundation of China （No.61072072）, the Science and Technology Project of Electronic Engineering Key Laboratory of Heilongjiang Provincial Department of Education （No.DZZD20100010）.

摘　　要：Chaotic special properties make the chaotic encryption technology be an important research field of information science and technology. However, as digital chaos is affected by the limited precision of computer, chaotic system properties present degradation-short pe-riodicity of output sequence. This paper proposes a double K-L （Karhunen-Loeve） transform method for Logistic 0/1 sequencer and then analyzes autocorrelation~ period~ com- plexity and frequency spectrum. Simulation results show that this method can effectively improve the complexity and the length selection of key sequence. Moreover, it can also increase the period of Logistic sequence in wider range~ which makes up the short periodicity phenomenon of digital chaotic sequence and makes digital chaotic key sequence be applied safely in encryption system.

关 键 词：Digital chaos Double K-L （Karhunen-Loeve） transform Key sequence. 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TN914.42[自动化与计算机技术—计算机科学与技术]